[openstack-dev] [nova][keystone] Message Queue Security

Davanum Srinivas davanum at gmail.com
Thu Apr 25 14:41:20 UTC 2013

Now i see it. you are right. we don't need it.

-- dims

On Thu, Apr 25, 2013 at 10:26 AM, Simo Sorce <simo at redhat.com> wrote:
> On Thu, 2013-04-25 at 10:12 -0400, Davanum Srinivas wrote:
>> Please see below:
>> Dropping the counter/nonce for the first cut sounds good to me.
> Ok then I will just drop it, I am writing some code to play with and the
> counter is just annoying and requires more state to be kept. I'll change
> the page and get rid of it.
>> >> 5. Can we please use ISO 8601 timestamps instead of unixtime?
>> >
>> > At the moment I am experimenting with python time.time() values that
>> > have sub-second resolution. ISO8601 timestamp do not really make sense
>> > here, This timestamp is not for human consumption, and having to parse
>> > it back and forth is unnecessary. Also ISO 8601 does not have sub-second
>> > resolution, while we may want to use it so that we can also drop the
>> > counter as the chance of 2 message being sent to the same target to end
>> > up with the same timestamp are low, and we can make it 0 by simply
>> > keeping around the old timestamp and increasing it by 1 if the new one
>> > matches exactly.
>> ISO8601 here is not for human consumption. In my environment, we make
>> sure all components are synced using NTPD and we like adding code to
>> reject messages outside of a time window.
> And you really should use NTP, but what has that to do with how you
> represent time in the metadata?
> time.time() gives you the numbers of seconds since the epoch in UTC, int
> his case with subseconds as well. If you can help me find better
> language to define the format I'll be happy to. But I think number of
> seconds since the epoch is fine, we do not need a structured date format
> here.
> Simo.
> --
> Simo Sorce * Red Hat, Inc * New York
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Davanum Srinivas :: http://davanum.wordpress.com

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